Method of making a pin stem catch or joint



E. MOREHOUSE 6 2,186,632

METHOD OF MAKING A PIN STEM CATCH 0R JOIN T Original Filed Dec. 20, 1937 [NV TOR. fiye/ze MO/lOES A TTORNEYS:

' METHODOIF MAKING A-PIN S'TEM I I oltJom'r' a Patented Jan. 1940 i QAICH Eugene Morehouse, Providence. It. 1., assignor to -B.. A. Ballou &

P Island Co Inc afcorporation oi .llthode v Original application jDecember ii 20, 1937,"Serial" August 12, 1938,- Serial No. 224,459

Divided and. this application "2'Claims. (c1. 29- -1605) This invention relates to a safety catch or joint;

and has for one of its objects the prcvisionof a safetycatch which will be foldedup fromsheet stock to provide apair'of ears closely in parallel relationship ,and with thebase which joins the 7 cars enlarged without thickening 'thestock or increasing the weight of the catch. The present 1 application is a division of copending application, Serial Number 180,-726,.filed December 20,1937. Another object of the invention is to enlarge the base of a sheet metalsafetycatch by deflecting the walls or ears which extend in'a parallelrelaarea of the base that it may have alarger support. to better prevent tipping over and alsoi to provide a better and more secure holding surface for attachment by solder or the like. 7

Another object of the invention is the provision of a safety catch having a baseenlarged sufficiently by reason of deflection of the stock so that the catch or joint may be soft soldered to an ornarotor member in looking position;

ment or device to which it is to be attached'whichwas not possible because of the small area of the base heretofore provided.

Anotherobject of :the invention is the provision of a method by which the stock may be deflected so asto prevent distortion of the'bearing openings for holding the rotor member of the catch. With these and other objects in View, the in-- vention consists of certain novel features of construction; as will be more fully described, and particularly pointed out in. the appended claims.

In the accompanyingdrawingz. v

Fig. l is a side elevation of a safety catch with the rotor member'shown in pin stem receiving po n; I Fig. 2 is a side elevation of the catch-gwith the Fig. 3 isa bottom plan View of the catch; Fig. l is an edge View of the catchj I Fig. 5 is a central sectional view online 5-5 of Fig. 2; i

Fig. 6 is a plan View of a strip of stock showing different operations upon the same in formulating the catch; q a

Figs. 7, 8 and 9 are sectional views on line 1-1, 88 and 39 of Fig-6;

Fig. 10 is an edge view of the cut out blank v shown in Fig. 9 as. partially bent to position;

the catch;

Fig. 12 is a sectional view on line l2'l2 of Fig.11.j A simple manner of forming a safety catch is to fold up a pro-shaped blank of sheet stock into generally U-shape with hearing openings in the parallelears for rotatably supporting the locking portion of. the catch orfor receiving vthepin stem 'trunnions for pivotally mounting the samein position. A. catchfsoformjed has a relatively small area base and is thus's'uitable only for hard soldering. "Various-arrangements have'been uti-. lized for thickening up the. stock to increase the base, but I have deviseda manner by which the stock of such a simple'U-Ishapedca'tch may be shaped to increase the base without thickening the stock; and I have accomplished this by' deforming the ears prior to-bending so as to provide a recess on the inner s'urfacesor portions of the ears which are toward each-otherand a bulge or protuberance on theouter surfaces of the ears, the stock being-all of the same thickness and the lower portion of theseprotuberances lying in subillustrating the preferredmeans by which these advantageous results may be accomplished:

With reference to the drawing, Ii! designates a ribbon strip of sheet stock which may be passed through a machine having a plunger to deflect the stock substantially perpendicularly to the sheet at a certain desired location to provide recesses H, H in one surfaceand at the same time form protuberances", I2, I2 on the opposite side of the sheetstock, as shown in Fig. '7, by stretching the stock as illustrated in this view without thickening or adding to the thickness of the stock. Thevnext operation is to provide openings I3 in the stock or these might be recesses so as to provide bearings for .the rotatable portion to be mounted between the ears of the de-- vice. 'After these"openings orrecesses are provided the blank is cut out of the'sheet stock along the line l4, as shownin Fi gs. 6 and 9, all ready for the bending operation shownin Fig. 10, which consists in folding the ears l5 into angular relationship at su'chspaced location as 16 between the deflectedportions while a stretching ,of the stock .ll occurs as to provide a base 18 havtuberan'ces'l2 have their surface 2! so located s that when the bending occurs the lower surface Fig. 11 is an elevation of the rotor portion of v of these protuberances. 2| will. be in the same plane with-the surface l9 between the protuberances so as to provide an increased bottom area 19, 2| for attachment to a suitable support.

When the device is to be used as a safety catch a rotor member such as 22 having a body portion 23, handles 24 and trunnion portions 25 to it the openings l3'will be mounted in position,

as shown in Figs. 1 to 5, by the completion of the bending of ears 15 of Fig. 10, and a slot 26 in the ears and 2'! in the rotor will be cut at some suitable or desired location so as to permit the pin stem extending into the opening 28 in the rotor member to be locked by rotation of the rotor to the position shown in Fig. 2. g

It will be readily apparent that recesses on the inner surface of the ears instead of openings may be provided as sometimes occurs in devices of this character, or the device may be utilized as a joint for mounting a pin stem in a rotary position instead of being utilized as a catch, the desirable functions of enlarging the base being the same regardless of which of these uses the device is to be put.

which the construction and method are susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim: I

1. The method (if-forming a safety catch part or joint for a pin stem comprising displacing the metal of a flat sheet of stock by stretching the same substantially perpendicularly to the sheet at spaced locations to provide recesses on one side and bulges on the other, bending the stock adjacent each of said formations and between them to locate at leasta part of the surface of said perpendicularly stretched portions on the same plane with the outer surface of the stock in the space between said stretched portions.

2. The method of forming a safety catch part or joint for a pin stem comprising displacing the metal of a fiat sheet of stock by stretching the same substantially perpendicularly to the sheet at spaced locations to provide recesses on one side and-bulges on the other, cutting blanks containing said formations from said sheet, and

bending the stock adjacent each of said forma- H 

